From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Gleixner Subject: Re: kfree causing high latency on 3.4.4-rt13 Date: Mon, 4 Feb 2013 12:49:56 +0100 (CET) Message-ID: References: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Cc: linux-rt-users@vger.kernel.org To: Austin Hendrix Return-path: Received: from www.linutronix.de ([62.245.132.108]:43198 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754001Ab3BDLt6 (ORCPT ); Mon, 4 Feb 2013 06:49:58 -0500 In-Reply-To: Sender: linux-rt-users-owner@vger.kernel.org List-ID: On Tue, 29 Jan 2013, Austin Hendrix wrote: > I'm running 3.4.4-rt13 on my systems, and while the realtime > performance is great, I occasionally see non-realtime processes block > for several seconds. Running latencytop, it looks like the kfree > kernel process is the worst offender. Does anyone have advice on how I There is no kfree process. kfree() is a function to release memory allocated by kmalloc. Can you provide the latencytop output please ? Thanks, tglx